Home / 156,315.58-215,687.10-87,406.29

Finding the Fourth Proportional to 156,315.58, 215,687.10 and 87,406.29

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Solution

The fourth proportional to 156,315.58, 215,687.10 and 87,406.29 is: 120,604.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,315.58 : 215,687.10 = 87,406.29 : x
  2. Step 2: Convert to fraction form
    156,315.58/215,687.10 = 87,406.29/x
  3. Step 3: Cross multiply
    156,315.58x = 215,687.10 × 87,406.29
  4. Step 4: Simplify right side
    156,315.58x = 18,852,409,211.86
  5. Step 5: Solve for x
    x = 18,852,409,211.86/156,315.58
  6. Step 6: Final answer
    x = 120,604.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.